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SpudFiles Potato Gun Commercial

Last post by quinn whitsitt
Posted in Combustion Cannons
Replies: 15
by PCGUY » Tue Oct 29, 2013 10:54 pm » in Combustion Cannons
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First post

I've been wanting to get in some spud shooting action this fall before the weather got cold. I know it's been a while since I filmed anything for...

Last post

thank you for creating this website is there anything i can do to help
15 Replies

1079656 Views

Last post by quinn whitsitt
Fri Feb 09, 2024 2:38 pm
Sketchup Model Library

Last post by mrfoo
Replies: 152
by dewey-1 » Tue Mar 24, 2009 12:12 pm
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First post

Over the last year I have made a lot of CAD drawings for
Pneumatic Launchers.

I have imported several of them into Sketchup format.
Here is the link...

Last post

Bollocks. Dewey put them out in the hope that, and I quote

some of you can make use of these!

There's absolutely nothing wrong with using them,...
152 Replies

553873 Views

Last post by mrfoo
Mon May 20, 2024 11:17 am
Solvent Welding Course Recommended For ALL

Last post by Technician1002
Replies: 46
by sgort87 » Fri Aug 04, 2006 8:18 pm
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First post

Originally posted by DR on the Spudtech forums:

IPEX Solvent Cements ONLINE Course can be found here:

It is recommended that you download and...

Last post

Your earlier post about just scoring the surface, has me wondering if that is why OATEY makes a brush tool that scores the inside of a fitting, and...
46 Replies

300360 Views

Last post by Technician1002
Thu Dec 02, 2010 5:04 pm

Topics

Metal-Metal Seal

Last post by Technician1002
Replies: 5
by ramses » Fri Jun 11, 2010 11:43 am

First post

A while ago, when I was machining a .25 porting piston valve, I accidentally made the piston such a good fit in the body of the valve that it...

Last post

In the grand scheme of things, almost everything leaks.

We pump down stuff and hold a vacuum (base pressure below 30 militorr) and measure the rate...

5 Replies

4280 Views

Last post by Technician1002
Sat Jun 12, 2010 2:16 pm
pop bottle to 1/2in pvc

Last post by Technician1002
Replies: 5
by spikerbond » Thu Jun 10, 2010 3:52 pm

First post

is it possible to use pvc cement to attach a pop bottle to 1/2in pvc?

Last post

May I ask why you want to attach a pop bottle to PVC?

This is a beautiful way to attach pop bottles, but it needs a lathe.

5 Replies

3185 Views

Last post by Technician1002
Thu Jun 10, 2010 6:34 pm
burst disk cartridges

Last post by jackssmirkingrevenge
Replies: 4
by spikerbond » Mon Jun 07, 2010 4:02 pm

First post

was bored during math and drew these up, i am planning on making the less complicated one so any comments/suggestions are greatly appreciated.

sorry...

Last post

I would be more inclined to go with cartridges, a filling valve and burst disk retaining mechainsm is likely to be relatively sophisticated and...

4 Replies

1865 Views

Last post by jackssmirkingrevenge
Wed Jun 09, 2010 10:31 pm
soldering a shrader to a brass adapter

Last post by c11man
Replies: 8
by spikerbond » Tue Jun 08, 2010 4:57 pm

First post

would it be possible to solder a shrader valve to a male quick connector?

Last post

i would change the end of the bike pump to a quick disconnect and then wouldnt have to worry about any of this

8 Replies

4448 Views

Last post by c11man
Wed Jun 09, 2010 4:04 pm
46% error in pressure gauge?

Last post by jimmy101
Replies: 4
by pat123 » Tue Jun 08, 2010 12:38 pm

First post

Me and Drex have been working on a hybrid and we couldn't get the fueling right. I think i found out why.

I found the volume of the meter and the...

Last post

Since you have measured and calculated the apparent error of the gauge just figure out what it will say when it is at the pressure you want....

4 Replies

2604 Views

Last post by jimmy101
Tue Jun 08, 2010 6:15 pm
new valve design?

Last post by ramses
Replies: 21
by spikerbond » Thu Jun 03, 2010 5:43 pm
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i have been thinking about this for awhile but just had some free time to make it in flash. do you think this will work? any comments/suggestions?

Last post

It would work with a few modifications.

Make the piston cover the holes to the chamber in the forward position.

Induce a leak in the back floating...
21 Replies

8658 Views

Last post by ramses
Fri Jun 04, 2010 4:18 pm
USG shop expose

Last post by chenslee
Replies: 2
by jagerbond » Tue May 25, 2010 2:46 pm

First post

Interesting article written about our shop, some of the other products we make and sell. There's even some BL-525 video action part way down.

Last post

What a small friggen world. I showed this to my buddy at work and he was like, oh yeah, I see them on the xB forums all the time (he has an Xb).

2 Replies

1676 Views

Last post by chenslee
Thu Jun 03, 2010 10:39 am
“NO DRILL” Sprinkler Valve Pneumatic Modification

Last post by Hubb
Replies: 54
by carlbelcher » Thu Jun 29, 2006 3:14 am
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“NO DRILL” Sprinkler Valve Pneumatic Modification

Parts Required:

1. Orbit Watermaster Model 57020
2. 1/4 NPTM X 1/4 NPTM Brass Fitting...

Last post

Despite the fact that this is a dead topic, I feel inclined to post an answer.

This sprinkler valve is different than a conventional inline one...
54 Replies

50909 Views

Last post by Hubb
Tue Jun 01, 2010 10:13 pm
Chamber to Barrel Volume Ratio Explained

Last post by jimmy101
Replies: 18
by dbracer443 » Wed May 26, 2010 11:25 pm
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I found a unit error in my calculation and as a result, reworked everything in metric. I converted back to english before graphing and then edited...

Last post

In case you haven't seen it, the only really decent experimental data on CB ratios was done by Burnt Latke (
18 Replies

193874 Views

Last post by jimmy101
Tue Jun 01, 2010 7:08 pm
another piston question

Last post by clemsonguy1125
Replies: 5
by kydavies » Thu May 27, 2010 10:08 pm

First post

im about to build my first coaxial piston valve and i was wondering if it is ok to have a small leak in the seal between the pilot and chamber (the...

Last post

Another trick is that if you shine a light through the barrel you shouldnt be able to see it from the back of the piston

5 Replies

2009 Views

Last post by clemsonguy1125
Fri May 28, 2010 7:32 pm
Simple Semi-Auto

Last post by jor2daje
Replies: 10
by TeyBobster » Wed May 26, 2010 11:21 pm

First post

I like making things simple, which means more reliable.

I just got into pneumatic spud cannons and I think its awesome! So I was looking at a lot...

Last post

No a most ball valves would vent air faster than its coming in the point is there is more pressure behind the piston if more air keeps coming in as...

10 Replies

5542 Views

Last post by jor2daje
Thu May 27, 2010 10:51 pm
Spring Actuated BUIS - Back Up Iron Sight

Last post by chinnerz
Replies: 12
by FighterAce » Wed May 26, 2010 2:36 pm

First post

I need some sort of back up iron sights for my new sniper rifle in case the scope breaks. I found some airsoft magpul ones but they are almost $80 so...

Last post

well if you want to point things out... There is no actual sight, its just a box right now. It was just a pre concept design. You could probable make...

12 Replies

4240 Views

Last post by chinnerz
Thu May 27, 2010 4:40 pm
Spudding Preference Survey

Last post by grock
Replies: 27
by DYI » Mon May 24, 2010 3:07 pm
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I will be creating an animation, a game, and two (simple) applications for an upcoming programming project. I need a target audience in some sort of...

Last post

muzzle speed based on hang time, fueling

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27 Replies

12443 Views

Last post by grock
Tue May 25, 2010 8:59 pm
Google Chrome - Faster than a flying potato

Last post by PCGUY
Replies: 3
by PCGUY » Tue May 25, 2010 10:13 am

First post

One of my coworkers just came up to me and said I had to watch this...

Last post

There was someone faster than you PCGUY.

Figured... I searched quickly for it but didn't see it.... guess that goes to show I need to improve...

3 Replies

2652 Views

Last post by PCGUY
Tue May 25, 2010 10:53 am
Casio EX FS-10 1000 fps camera today $99.99 SHIPPED!

Last post by saefroch
Replies: 9
by boyntonstu » Fri May 21, 2010 7:50 am

First post

Casio EX FS-10 1000 fps camera today $99.99 SHIPPED!

Best deal for a high speed camera.

I ordered one.

They say free shipping for today only....

Last post

Dang nice deal you landed there, wish we could all be so luck to find a nice piece of equipment, between this and that oxy tank you found... I...

9 Replies

5370 Views

Last post by saefroch
Mon May 24, 2010 6:29 pm
Homemade 'Ballistics Gel'

Last post by MrCrowley
Replies: 15
by MrCrowley » Thu May 20, 2010 1:43 am
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Just made this because I was bored, I haven't tried before and thought it'd be interesting. Really not hard to make at all, I mixed 250g of gelatin...

Last post

Here are some preview frame grabs. Sorry for the bad quality, it was rendered badly (by a friend) and I can't render it again until I get a firewire...
15 Replies

5786 Views

Last post by MrCrowley
Mon May 24, 2010 1:02 am
Using teflon tape in place of an o-ring in compact valve

Last post by mark.f
Replies: 3
by Gun Freak » Fri May 21, 2010 8:21 pm

In compact piston valves, people seal the rear bushing with an o-ring. But I heard somewhere, cant remember exactly where, that you could seal slip...

3 Replies

1524 Views

Last post by mark.f
Sat May 22, 2010 1:03 pm
Supersonic Airsoft BB's

Last post by Spudinator
Replies: 27
by Dave_424 » Sat May 08, 2010 7:33 am
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Well guys, been a while since I posted properly because I have been tuning and making many new parts for my UK Airforce Condor.

Ive added a 24 .25...

Last post

Hmm news to me, guess these theories never surfaced during my time on spudtech. I didnt consider a dead space between valve and breach, assumed they...
27 Replies

19990 Views

Last post by Spudinator
Thu May 20, 2010 5:18 pm
perfect O ring groves no lathe

Last post by Technician1002
Replies: 12
by kydavies » Tue May 18, 2010 12:09 am

First post

so far i haveonly used this on a wooden piston but here it is
all you need is: a vice, a pipe cutter (normally used to cut metal) and a file

1 take...

Last post

I made one by cutting about 1/8th inch off the end of a pipe, sanding it flat and gluing it in a coupler. Sliding the o ring up to the ring of pipe,...

12 Replies

8003 Views

Last post by Technician1002
Wed May 19, 2010 6:27 pm
My Homemade Chronographs

Last post by Technician1002
Replies: 13
by MrCrowley » Wed May 19, 2010 2:18 am

First post

Audio Chronograph:
Big thanks to Technician1002 for his help .

For this I used a dynamic Akai ADM-20 microphone plugged in to my Dell laptop and I...

Last post

It is true that many CF bulbs use a high frequency inverter. It is not true that all CF bulbs are free of line frequency flicker. Due to the heat and...

13 Replies

7712 Views

Last post by Technician1002
Wed May 19, 2010 12:28 pm
Any old school members still around?

Last post by kozak6
Replies: 4
by Spudinator » Mon May 17, 2010 5:59 pm

First post

Hey all, been a while since I've dropped in. I was curious to know how many original Spudtech members are still visiting, back in the days when the...

Last post

I was a member on Spudtech.

4 Replies

3992 Views

Last post by kozak6
Mon May 17, 2010 8:26 pm
solvent welding a collar

Last post by mikespahn
Replies: 2
by mikespahn » Sat May 15, 2010 1:01 pm

First post

i'm making a collar to go around a 4 male pipe thread out of pvc so that i can put an o ring seal between them and not have to worry about the...

Last post

i want a collar with a seal around a threaded male adapter so the mating part isn't as hard to torque down... relying on the tapered thread for the...

2 Replies

1414 Views

Last post by mikespahn
Mon May 17, 2010 3:30 pm
Audio Chronographing

Last post by MrCrowley
Replies: 22
by MrCrowley » Tue May 11, 2010 9:52 pm
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Tried some audio chronographing today, more difficult than I thought.

Parameters:
Cannon: V.A.L
Projectile: Golfball
Distance to target: 5m
Mic...

Last post

Wired the circuit in parallel and I seem to be getting better peaks/spikes on Audacity. It doesn't work so well in direct sunlight or with lights...
22 Replies

4653 Views

Last post by MrCrowley
Sat May 15, 2010 8:00 pm
Removing human error from pneumatics...

Last post by saefroch
Replies: 29
by saefroch » Wed May 12, 2010 10:23 am
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Just a thought here about removing the human error factor from pneumatics, since with all current valve designs, the valve efficiency is somewhat...

Last post

I have seen that design before on the forum, and even considered building one. But the issue is still ammunition that can seal. Ball bearings would...
29 Replies

5917 Views

Last post by saefroch
Thu May 13, 2010 9:12 pm
Another Fridgy Related Thread

Last post by thedeathofall
Replies: 8
by thedeathofall » Wed May 12, 2010 4:09 pm

First post

I happen to have seen a lot of threads about compressors lately... maybe that's just me...

Anyway, I was wondering how many people built/bought...

Last post

Alright. I might give ebay a shot. I have had poor luck finding stuff there recently. Does anyone else have first hand experience with this...

8 Replies

4356 Views

Last post by thedeathofall
Thu May 13, 2010 12:20 am

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